Using the DeWalt DCD706B hammer drill is easy. First, make sure you have a fully - charged battery (sold separately) and insert it into the tool. Select the appropriate speed setting using the 2 - speed transmission based on your drilling task. For more precise control, adjust the 15 - clutch settings. When starting to drill, hold the drill firmly and align it with the target. The LED foot light will help you see the work area clearly. As for maintenance, after each use, wipe the drill with a clean, dry cloth to remove dust and debris. Keep the 3/8 - inch ratcheting chuck clean and lubricated to ensure it can grip bits properly. Also, store the drill in a cool, dry place. And always remember, if you're not using the drill, turn it off to save battery life.